Thank you all..
I learnt nice things, and my worry of Ca is reduced.. NYCrochidman.. Thanks again.
I have Niveum too.. hagfish.. I think I was giving bit lesser light.. I would elevate the pots. Might it could be the reason.
I have concolor in humus and some limestone pebbles .. I have niveum in sphag moss and clay pieces with egg shell powder added. It seems I am giving bit lesser lights to these Paphs.. will elevate them to little more light and would post the results.
OB has wonderful and helpful people
Cheers,
Kaarthiik